Space heater



Aug. 5, 1952 A. c. BAUMANN SPACE HEATER Filed Oct. 2, 1950 INVENTOR ARTHUR C. BAUMANN' aha ATTORNEY Patented Aug. 5, 1952 SPACE HEATER Arthur Baumann, Philadelphia, Pa; 1 Application October 2, 1950, Serial no. 188,007

2 Claims.

My invention relates to a heater of the type which is used for heating uninhabited quarters such as unfinished buildings, tobacco drying sheds and other places where the presence of obnoxious products of combustion is not objectionable.

One object of the invention is to produce an improved heater of the type set forth.

A still further object is to produce an improved heater which is compact, relatively light and relatively inexpensive, and one which is durable and highly efficient in operation.

These and other objects are attained by my invention as set forth in the following specification and as shown in the accompanying drawing in which:

Fig. l is a view, partly in side elevation and partly in section of a heater embodying the invention, certain parts being omitted.

Fig. 2 is fragmentary, vertical sectional view showing details of construction.

Fig. 3 is a section on line 3-3 on Figure 2.

The heater shown in the drawing includes a conventional oil burner Ill, which has th usual parts and controls and is therefore not shown nor described in detail, it being sufiicient to point out that combustion takes place in an inner conical shell 12 which is housed in an outer cylindrical shell It. The small end of the inner shell I2 is closed off by means of end plate is which is provided with air inlet holes 18 for supplying secondary air to the combustion area. The holes I8 are slanted toward the axis of the shells so as to converge the air streams passing therethrough. This, and the angular displacement of the holes l8 relative to said axis, causes the flame to swirl and improves combustion. Between the small end of the inner shell I2 and the corresponding end of'the outer shell M are a series of vanes 2!] which serve to diifuse the air propelled by blower 22. by a belt 24 and motor 26. The inner conical shell l2 flares in a direction away from the oil burner with the large end of the inner shell disposed close to the wall of the outer shell. It will also be noted that the inner shell is shorter than the outer shell. The inner conical shell 12 is provided with holes 28 for admitting some of the air propelled by blower 22 into the space between the inner and outer shells. The remainder of this air passes through the space between the large end of the inner shell and the wall of the outer shell. In order to increase the flow of air through holes 28, I provided scoops 30 which project into the space between th inner and The blower is driven outer shells and serve to divert air into the interior of the inner shell. The flow of air is shown by the arrows on Fig. 2 of the drawing.

. In the other end of the outer shell is a flared insert 3| the outer end of which is closed with a screen 32 for preventing flame from passing into the enclosure being heated and thus guards against accidental fire or injury.

At the discharge end of the heater, there is a pocket 34 for accommodating a bimetallic element 36 which opens or closes a switch in control box 38 to start or stop the oil burner l0 according to the temperature to which the device is set. For best results, I found that the bimetallic element 36 should be subjected to both the temperature of the heater and to the ambient temperature rather than to either temperature alone. To this end, I have provided the upper Wall of the pocket 34 with holes 42 through which some of the heated gases are brought to bear upon the bimetallic element 36. In the bottom wall of pocket 34 I provide openings 43 through which the bimetallic element 35 is also subjected to ambient temperature.

By the arrangement described the flame of the burner is provided with air through slanted holes 18 and with air which has been pre-heated by contact with the exterior of conical shell I2 through holes 28. The air supply described results in substantially perfect combustion, in that no smoke is produced in the combustion chamber.

When the heater is to be used in upper floors, or where it may have to be moved from place to place, a pipe 44 leads from an oil drum, or other source of supply, not shown, to the oil burner, it being understood that a conventional pump, also not shown, will be cut into pipe 44. When the heater is to be used as a stationary unit, the platform which supports the heater can take the form of a tank 46 which is connected to pipe 48 which leads to the suction side of the oil burner pump.

In either event, the platform on which the heater is mounted is provided with wheels 50 on which the heater can be moved from one location to another.

What I claim is:

l. A space heater including an outer cylindrical shell, an inner conical shell with the small end of the conical shell disposed adjacent a first end of said cylindrical shell and with the large end of said conical shell disposed inwardly from the second end of said outer shell, an end plate closing the small end of said conical shell, a combustion device for producing a flame within said conical shell there being apertures in said end plate for supplying air to said flame, there being air inlet holes in said conical shell, means for forcing air under pressure into the space between said inner conical shell and said outer cylindrical shell and through said air inlet holes into the interior of both shells, there being a pocket formed near the second end of said outer shell, anda thermostat. located insaid pocket and adapted to control said combustion device, there being a first opening in a wall of said pocket for admitting products of combustion from said outer shell into said pocket, and a second opening in another wall of said pocket for admittingair from the space to be heated into .said pocket.

2. The structure recited in claim 1 together with a hollow support for said heater adapted to receive fuel, and a pipe leading from said hollow support to the flame producing device.

ARTHUR C. BAUMANN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 648,259 Hollingswortli Apr. 24, 1900 2,072,731 Crosby Mar. 2, 1937 2,225,775 Garrett Dec. 24, 1940 2,418,097 -.-Rufi Mar. 25, 1947 2,510,645 McMahan June 6, 1950 

